HD66421 Datasheet, PDF (39/46 Pages) Hitachi Semiconductor – (RAM-Provided 160 Channel 4-Level Grey Scale Driver for Dot Matrix Graphics LCD)

Preliminary
Rev. 1.1E '99.02.10
HD66421
Blink Registers (R8 to R10): The blink bit Bit 4 is clock-enable bit. This bit sets to 1, the
registers (figure 41) designate the 8-bit groups to signal CO,CL1,FLM and M stop in master mode.
be blinked. Setting a bit to 1 blinks the correspond- They are high-Z. Data bits 7 and 5 are unused;
ing 8-bit group. Any number of groups can be they should be set to 0 when written to.
blinked; setting all the bits to 1 will blink the entire
LCD panel. These bits are valid only when the Gray Scale Palette Registers (R12 to R15): The
BLK bit of control register 2 is 1. R10's data bits 7 gray scale palette registers (figure 43) designate
to 4 are unused; they should be set to 0 when the grayscale level or colour. Use these registers
written to.
to enable an optimal grayscale or colour display.
If GRAY bit is 1, these registers are inactive. Data
Partial Display Block Register (R11): The Partial bits 7 to 5 are unused; they should be set to 0
display block register (figure 42) designates the when written to.
block of partial display. It use from bit 3 to bit 0.
R8
R9
R10
Data bit
Set value
Set value
Set value
7
6
5
4
3
2
1
0
BK0 BK1 BK2 BK3 BK4 BK5 BK6 BK7
BK8 BK9 BK10 BK11 BK12 BK13 BK14 BK15
BK16 BK17 BK18 BK19
Figure 41 Blink Registers (R8, R9, R10)
Data bit
Set value
7
6
5
4
3
2
1
0
CLE PB3 PB2 PB1 PB0
Set value
H'00
H'01
H'02
H'03
H'04
H'05
Row no.
COM1 to COM8
COM9 to COM16
COM17 to COM24
COM25 to COM32
COM33 to COM40
COM41 to COM48
Set value
H'06
H'07
H'08
H'09
H'0A
H'0B
Row no.
COM100 to COM93
COM92 to COM85
COM84 to COM77
COM76 to COM69
COM68 to COM61
COM60 to COM53
(ADC= "0". If "1" ,
reverse direction)
Figure 42 Partial Display Start Raster Register (R11)
Data bit
7
6
5
4
3
2
1
0
R12
R13
R14
R15
Set value
Set value
Set value
Set value
GP14 GP13 GP12 GP11 GP10
GP24 GP23 GP22 GP21 GP20
GP34 GP33 GP32 GP31 GP30
GP44 GP43 GP42 GP41 GP40
Figure 43 Grayscale Palette Registers (R12 to R15)
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